Explicit Operator

XElement.Explicit Operator

Cast the value of this XElement to a Nullable<T> of Boolean.

This API is not CLS-compliant. 

Namespace:  System.Xml.Linq
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)

public static explicit operator Nullable<bool> (
	XElement element


Type: System.Xml.Linq.XElement

The XElement to cast to Nullable<T> of Boolean.

Return Value

Type: System.Nullable<Boolean>
A Nullable<T> of Boolean that contains the content of this XElement.


The element does not contain a valid Boolean value.

When converting to Nullable<T> of Boolean from an attribute or element, allowed values are "0", "1", and any string that produces "true" or "false" after trimming and conversion to lower case.

The following example creates an element with boolean content. It then retrieves the value by casting to Nullable<T> of Boolean.

XElement root = new XElement("Root", 
    new XElement("BoolValue1", true),
    new XElement("BoolValue2", false));
bool? bool1 = (bool?)root.Element("BoolValue1");
bool? bool2 = (bool?)root.Element("BoolValue2");
Console.WriteLine("Nullable Boolean: value1={0}", bool1);
Console.WriteLine("Nullable Boolean: value2={0}", bool2);

This example produces the following output:

Nullable Boolean: value1=True
Nullable Boolean: value2=False

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5

.NET Compact Framework

Supported in: 3.5

XNA Framework

Supported in: 3.0

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